Tag: mrp

Database, Errors and Bugs, RAC | Data Guard

After Patch: MRP0: Background Media Recovery terminated with error 10485

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Ok,
I had that some time ago after applying Patch 27475598 – Oracle JavaVM Component 11.2.0.4.180417 Database PSU.
Why? Well, this is Non RAC-Rolling Installable and also Not Data Guard Standby First Installable.

This means there downtime for this patch, no escape.

I had to (skipping all the standard opatch steps, you can see those on README):

  • Stop DG Replication:
dgmgrl /
show configuration
show database mydg
edit database 'mydg' set state='apply-off';
show database mydg
  • Run postinstall.sql in upgrade mode with only 1 instance on (disable RAC):
cd $ORACLE_HOME/sqlpatch/27475598
sqlplus /nolog
SQL> CONNECT / AS SYSDBA
SQL> STARTUP
SQL> alter system set cluster_database=false scope=spfile;
SQL> SHUTDOWN
SQL> STARTUP UPGRADE
SQL> @postinstall.sql
SQL> alter system set cluster_database=true scope=spfile;
SQL> SHUTDOWN
SQL> STARTUP

Ok, all good, seems all fine.

But now when starting my DG replication:

dgmgrl /
show configuration
show database mydg
edit database 'mydg' set state='apply-on';
show database mydg

What I see is:

DGMGRL> show database mydg

Database - mydg

  Role:            PHYSICAL STANDBY
  Intended State:  APPLY-ON
  Transport Lag:   0 seconds (computed 1 second ago)
  Apply Lag:       41 minutes 53 seconds (computed 1 second ago)
  Apply Rate:      (unknown)
  Real Time Query: OFF
  Instance(s):
    myprod

  Database Error(s):
    ORA-16766: Redo Apply is stopped

Database Status:
ERROR

DGMGRL>

And on Database Alert Log:

MRP0: Background Media Recovery terminated with error 10485
Errors in file /u01/app/oracle/diag/rdbms/axwest/greporaprod/trace/greporaprod_pr00_42628.trc:
ORA-10485: Real-Time Query cannot be enabled while applying migration redo.
Completed: ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION
Recovery interrupted!
MRP0: Background Media Recovery process shutdown (greporaprod)

Well, in my case it happens because I use an Active Dataguard, in open read only. The solution? Start you DG in Mount Mode to apply the patching replication!

This is well described as per MOS: MRP process getting terminated with error ORA-10485 (Doc ID 1618485.1).

After getting sync, you can simple promote it to read only mode again.

Hope it helps!

Backup and Restore, Database, Errors and Bugs, RAC | Data Guard

ORA-01153: an incompatible media recovery is active

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When trying to start or increase parallel of recover manager on datagauard (MRP):

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT FROM SESSION;
*
ERROR at line 1:
ORA-01153: an incompatible media recovery is active

I simply happen because there already are a process runnning, let’s check:

More“ORA-01153: an incompatible media recovery is active”

Database, RAC | Data Guard

After adding Datafile in Primary the MRP Stopped in Physical Standby (Dataguard)

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Hi all!
After add a datafile in PRIMARY database, the STANDBY MRP stopped. An “ALTER DATABASE RECOVER MANAGED STANDBY DATABASE” does not solved te problem, as you see:

SQL> SELECT SEQUENCE#, Name, APPLIED FROM V$ARCHIVED_LOG where APPLIED  'YES' and SEQUENCE#  ALTER DATABASE RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
Database altered.
SQL> SELECT SEQUENCE#, Name, APPLIED FROM V$ARCHIVED_LOG where APPLIED  'YES' and SEQUENCE# < (select max(SEQUENCE#) -1 from V$ARCHIVED_LOG);
SEQUENCE#  NAME                                                                              APPLIED
----------  --------------------------------------------------------------------------------  ---------
15075  /db/u1004/oracle/admin/MYDB/arch/arch_1_823102978_15075.arc                    NO

More“After adding Datafile in Primary the MRP Stopped in Physical Standby (Dataguard)”

Database, Errors and Bugs, RAC | Data Guard

ORA-10456: cannot open standby database; media recovery session may be in progress

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A dataguard quick tip!

# Error

SQL> ALTER DATABASE OPEN READ ONLY;
ALTER DATABASE OPEN READ ONLY
*
ERROR at line 1:
ORA-10456: cannot open standby database; media recovery session may be in progress

# Solution

SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE CANCEL;
Database altered.
SQL> ALTER DATABASE OPEN READ ONLY;
Database altered.
SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE DISCONNECT;
Database altered.

See ya! 🙂
Matheus.